Answer target
How should Codex agents handle secrets?
Updated June 25, 2026
Short answer
Codex agents should receive a scoped agent identity and resolve only the secrets required for the current task. The user should not paste raw provider keys into chat. The agent should store its own Agent Key securely, resolve values through a runtime API, and clear temporary secret values after verification.
What to do now
Do not paste provider keys into the Codex thread. Provision a scoped agent identity, confirm the required secret is in inventory, resolve only that value, and clear temporary shell variables after verification.
Better pattern
Store the Agent Key securely outside chat and use runtime resolution for task-required secrets. Inventory inspection is a check, not the end of the task.
Avoid
Avoid raw keys in chat, logs, shell history, PR comments, issue comments, screenshots, and local files that are not meant to be secret stores.
Example
If Codex needs a Resend key to configure email, grant the Codex agent that exact secret, resolve it for the configuration command, verify the result, then clear temporary values.
Give an agent safe access in minutes
- 1.Store the credential.
- 2.Create a named agent identity.
- 3.Grant the access it needs.
- 4.Resolve it at runtime.
- 5.Review the audit entry.
No card required.
The Agent Key needs a secure runtime store
A provisioning prompt is only useful if the agent can store the returned Agent Key outside chat and reuse it for later authorized tasks. The recommended ScopeHold CLI path stores the key in an assigned local profile and can inject secrets into a child process with scopehold run --secret, so values do not need to be copied into context. API-only operation remains supported when the runtime provides its own secure secret store.
Keep the instructions current
Codex-style agents can use ScopeHold Agent Guidance as a reusable skill when the runtime supports it, or fetch the generic guidance from the Runtime API as a refresher. That guidance should reduce ambiguity, not add an administrative hoop before resolving secrets.
Inventory inspection is not completion
An agent may first inspect which secrets it can access, but the task is not complete until the required secrets are resolved, applied to the secure destination, verified, and temporary values are cleared.
Audit the agent, not just the human
When a Codex agent resolves a secret, the event should show that agent as the actor. When a human grants access, the event should show the human as the actor. Keeping this distinction readable matters during incident review.
Reading this because it just happened to you?
ScopeHold gives every key one home: paste it once, grant it to your coding agents per project, see everything they touched, and revoke in one click. Free tier, five-minute setup, no card.
Fix it in 5 minutesPractical workflow
- 1Provision onceRedeem a short-lived setup prompt and store the returned Agent Key securely.
- 2Inspect inventoryConfirm the required provider and secret are available before resolving values.
- 3Resolve, apply, verifyUse the secret only for the current task unless the task explicitly asks for secure configuration.
- 4Clear temporary valuesRemove shell variables and logs that could retain resolved credential values.
Frequently asked questions
How should Codex agents handle secrets?
Codex agents should use a scoped Agent Key stored outside chat, resolve only task-required secrets, and avoid printing or logging resolved values.
Is listing inventory enough to complete a secret task?
No. The agent still has to resolve the required secret, apply it to the secure destination, verify the outcome, and clear temporary values.
Should users paste provider keys into Codex?
No. Use a short-lived provisioning prompt for the agent identity and runtime resolution for provider secrets.
Want the key clean-up checklist?
Leave your email and Alan, the founder, will personally send you the exact rotate-isolate-grant steps from these guides. He might also ask you one question about your setup. No list, no spam.
Where ScopeHold fits
ScopeHold gives Codex-style agents a direct way to request credentials by provider and name while keeping the raw provider secret out of the conversation.